1-44
Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
Chapter 1 Cisco 7500 Series Product Overview
Route Switch Processor Overview
RSP EEPROM
An electrically erasable programmable read-only memory (EEPROM) component on the RSP stores
board-specific information such as the board serial number, part number, controller type, hardware
revision, and other details unique to each board. This EEPROM is not a spare and cannot be programmed
in the field.
RSP Asynchronous Serial Ports—Console and Auxiliary
Two asynchronous EIA/TIA-232 serial ports on the RSP, the console and auxiliary ports, provide the
means for connecting a terminal, modem, CSU, DSU, or other external device for configuring,
managing, or connecting to the system. A data circuit-terminating equipment (DCE) EIA/TIA-232
receptacle console port on the RSP provides a direct connection for a console terminal.
Note
EIA/TIA-232 was known as recommended standard RS-232 before its acceptance as a standard by
the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).
The adjacent DTE EIA/TIA-232 plug auxiliary port supports flow control and is often used to connect
a modem, a DSU/CSU, or other optional equipment for Telnet management of the attached device.
The console and auxiliary ports support asynchronous transmission. Asynchronous transmission uses
control bits to indicate the beginning and end of characters, rather than precise timing. Serial interface
ports on serial interface processors and port adapters support synchronous transmission, which
maintains precise clocking between the transmitter and receiver by sending frames of information that
consist of separate clock signals along with the data signals.
Note
When connecting serial devices, ensure that the devices support the proper transmission timing
methods for the respective port: asynchronous for the console and auxiliary ports, and synchronous
for the serial ports on serial interface processors and port adapters.
The following sections describe the pinouts for the console and auxiliary connectors and cables for the
RSPs:
•
RSP Console Port Pinout, page 1-44
•
RSP Auxiliary Port Pinout, page 1-45
•
RSP2, RSP4/4+, and RSP8 Console and Auxiliary Y-Cable Pinouts, page 1-45
(Specific differences between RSPs are clearly noted.)
Note
The console and auxiliary cables are shown in
Figure 3-22 on page 3-32
. These cables can be used
with all RSPs. The console Y-cable, CAB-RSP2(4)CON, and auxiliary Y-cable, CAB-RSP2(4)AUX,
are shown in
Figure 3-23 on page 3-33
and
Figure 3-24 on page 3-33
, respectively. These cables can
be used with the RSP2, RSP4/4+, or RSP8 in the Cisco 7507 and Cisco 7513 routers.
RSP Console Port Pinout
The console port on the RSP is an EIA/TIA-232 DCE DB-25 receptacle. Both the
Data Set Ready (DSR) and Data Carrier Detect (DCD) signals are active when the system is running.
The console port does not support hardware flow or modem control. The console port requires a
straight-through EIA/TIA-232 cable.
Table 1-13
lists the console port pinout.
